With AWS CloudFormation, you declare all of your resources and dependencies in a
template file. The template defines a collection of resources as a single unit called
a
stack. AWS CloudFormation creates and deletes all member resources of the stack together
and manages all dependencies between the resources for you.

Amazon CloudFormation makes use of other AWS products. If you need additional
technical information about a specific AWS product, you can find the product's technical
documentation at docs.aws.amazon.com.

APIs for stacks

When you use AWS CloudFormation, you manage related resources as a single unit called
a stack. You create, update, and delete a collection of resources by creating, updating,
and deleting stacks. All the resources in a stack are defined by the stack's AWS
CloudFormation template.

If you need to make changes to the running resources in a stack, you update the
stack. Before making changes to your resources, you can generate a change set, which
is
summary of your proposed changes. Change sets allow you to see how your changes might
impact your running resources, especially for critical resources, before implementing
them.

AWS CloudFormation StackSets lets you create a collection, or stack set, of stacks
that can automatically and safely provision a common set of AWS resources across multiple
AWS accounts and multiple AWS regions from a single AWS CloudFormation template. When
you
create a stack set, AWS CloudFormation provisions a stack in each of the specified
accounts
and regions by using the supplied AWS CloudFormation template and parameters. Stack
sets
let you manage a common set of AWS resources in a selection of accounts and regions
in a
single operation.